BUFR table B descriptors for atmospheric composition

[marijanacrepulja]

Initial request

ECMWF is proposing a new BUFR table B descriptors to represent atmospheric composition observations.

Amendment details

Amendment details

1. Update CCT-11 that is linked to 0-01-035 for Originating centre

Code	Originating centre
293	University of Bremen
294	Netherlands Institute for Space Research (SRON)
295	The Royal Belgian Institute for Space Aeronomy (BIRA-IASB)
296	The French National Centre for Scientific Research (CNRS)
297	The Nanjing Institute of Environmental Sciences (NIES)
298	Dynamic Meteorology Laboratory (LMD)
299	The Rutherford Appleton Laboratory (RAL)

2. Add a new elements in table B

F X Y	ELEMENT NAME	UNIT	SCALE	REFERENCE VALUE	DATA WITH (bits)
0-02-009	MODIS aerosol algorithm	CODE TABLE	0	0	4

3. Add a new CODE/FLAG TABLE 0-02-009 for MODIS aerosol algorithm

Code	MODIS aerosol algorithm
0	Land corrected reflectances
1	Ocean best solution
2	Ocean average solution
3-14	Reserved
15	Missing value

4. Add a new elements in table B

F X Y	ELEMENT NAME	UNIT	SCALE	REFERENCE VALUE	DATA WITH (bits)
0-33-054	Overall quality of retrieved atmospheric profile	Code table	0	0	3

5. Add a new CODE/FLAG TABLE 0-33-054 for Overall quality of retrieved atmospheric profile

Code	Overall quality of retrieved atmospheric profile
0	Profile values good
1	Profile values suspected
2	Reserved
3	Profile values not good
4-6	Reserved
7	Missing

6. Add a new elements in table B

F X Y	ELEMENT NAME	UNIT	SCALE	REFERENCE VALUE	DATA WITH (bits)
0-20-079	Snow or ice crystals indicator	Code table	0	0	2

7. Add a new CODE/FLAG TABLE 0-20-079 for Snow or ice crystals indicator

Code	Snow or ice crystals indicator
0	No snow or ice
1	Snow present
2	Reserved
3	Missing

8. Add a new elements in table B

F X Y	ELEMENT NAME	UNIT	SCALE	REFERENCE VALUE	DATA WITH (bits)
0-08-045	Character of particulate matter	Code table	0	0	8

9. Add a new CODE/FLAG TABLE 0-08-045 for Character of particulate matter

Code	Character of particulate matter
0	Aerosols all types
1	Desert dust
2	Black carbon
3	Sea salt
4-254	Reserved
255	Missing

10. Add a new elements in table B

F X Y	ELEMENT NAME	UNIT	SCALE	REFERENCE VALUE	DATA WITH (bits)
0-15-043	Number of averaging kernel layers	Numeric	0	0	10

F X Y	ELEMENT NAME	UNIT	SCALE	REFERENCE VALUE	DATA WITH (bits)
0-15-044	Averaging kernel value	Numeric	6	- 5000000	31

Comments

No response

Requestor(s)

Roberto Ribas, Marijana Crepulja (both from ECMWF)

Stakeholder(s)

Copernicus Atmosphere Monitoring Service

Publication(s)

Example: Manual on Codes (WMO-No. 306), Volume I.2, BUFR table B

Expected impact of change

MEDIUM

Collaborators

No response

References

No response

Validation

No response

[amilan17]

https://github.com/wmo-im/CCT/wiki/Teleconference.2%263May.2023 notes:
Marijana presented proposal; Jeff pointed out that there are originators in the main table that are not national centers; there was a discussion on originating centre tables and which ones should be in use.

ACTION (@amilan17):

• check if CCT-11 contains all entries from CCT-1.
• check 001033 and 001035 the same

[amilan17]

https://github.com/wmo-im/CCT/wiki/Teleconference.6.7.June.2023 notes:
0-01-035 has more space;

[marijanacrepulja]

Hi @amilan17, I have updated the branch. Could you please check and move it to ready for FT.

I have realised that entries for 0-01-035 Originating centre is linked to Common Code Table C-11. Therefore I have to create an issue under CCT in order to update C11.csv file

Many thanks!

[amilan17]

1. For consistency with "20022,Character of precipitation" and "020026,Character of obscuration" I recommend changing 008045 to "Character of particulate matter"
2. CODE/FLAG TABLE 0-20-079: Do we need to indicate that ice crystals are present or just snow?

[marijanacrepulja]

• For consistency with "20022,Character of precipitation" and "020026,Character of obscuration" I recommend changing 008045 to "Character of particulate matter"
• CODE/FLAG TABLE 0-20-079: Do we need to indicate that ice crystals are present or just snow?

@amilan17 As for entries in 0-20-079, these values are required for now, we made name generic for the future use of the table

[amilan17]

https://github.com/wmo-im/CCT/wiki/Teleconference.13.July.2023 notes:

@marijanacrepulja will update branch and then it's ready

[amilan17]

https://github.com/wmo-im/CCT/wiki/Teleconference.13.July.2023 notes:

@marijanacrepulja will provide samples and @jbathegit will validate within a week

[marijanacrepulja]

sample_for_descriptors.tar.zip

Hi @jbathegit, I have uploaded the sample.

Many thanks for your help with validation.

[amilan17]

branch is ready, waiting for validation.

[SibylleK]

Here the output of the DWD BUFR reading software:
sample_for_descriptors.bufr.DWDreadbufrxOutput.zip

The values are the same as in sample_for_descriptors.bufr.txt.

There is a typo in BUFRCREX_TableB_en_15.csv for the reference value of 015044. It should be written without a space. (-5000000 instead of - 5000000)

Otherwise, in my view, the validation is done.

[jbathegit]

The sample file looks OK to me too.